Ship propeller duct



FIG. 1 is a view in rear perspective of the ship propeller duct.

FIG. 2 is a view in front perspective thereof.

FIG. 3 is a view in cross-section of the ship propeller duct.

FIG. 4 is a view in side elevation of FIG. 3.

The broken line disclosure of a propeller and shaft is for illustrativepurposes only.

The ornamental design for a ship propeller duct, as shown and described.